Lyocell fiber with recycled cellulose

Abstract

The invention relates to a Lyocell fiber with recycled cellulose, which uses recycled cellulose pulp to dissolve in the spinning solution. The weight percentage of the recycled cellulose in the spinning solution is 30% to 55%. The Lyocell fibers of the invention also have hydrophilic, cooling, drape, antistatic, and biodegradable properties compared to the Lyocell fibers without recycled cellulose.

Claims

1. A Lyocell fiber with recycled cellulose, which uses recycled cellulose pulp to dissolve in the spinning solution, comprising 30% to 55% weight percentage of recycled cellulose in the spinning solution.

2. The Lyocell fiber with recycled cellulose of claim 1, wherein the weight percentage of the recycled cellulose in the spinning solution is 35% to 55%.

3. The Lyocell fiber with recycled cellulose of claim 1, wherein the weight percentage of the recycled cellulose in the spinning solution is 43% to 52%.

4. The Lyocell fiber with recycled cellulose of claim 1, wherein the recycled cellulose is natural plant cellulose.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] N/A

DETAILED DESCRIPTION

[0011] General fibers can be divided into natural fibers and artificial fibers. Natural fibers exist in nature. According to different sources, natural fibers can be divided into plant fibers, animal fibers, and mineral fibers. In contrast, artificial fibers refer to fibers made by processing, which can be processed from natural raw materials (for example, Modal fiber, Lyocell fiber, etc.) and can also be synthesized through chemical methods (for example, polyester fiber, nylon, etc.).

[0012] The source recycled fiber materials can be recycled natural fibers and recycled artificial fibers. Recycled natural fibers can be processed recycled cotton, recycled wood pulp, recycled paper pulp, recycled hemp (such as recycled flax, recycled ramie, recycled jute), and other recycled natural fibers that contain natural plant fibers. The source of these natural plant fibers can be wholly or partly from clothing manufacturing residues and/or old clothing, wood pulp, rag pulp, textiles, clothing, cotton in order to save resources and achieve the purpose of recycling and reusing fiber materials.

[0013] Lyocell fiber is a kind of artificial fiber. The manufacturing method of Lyocell fiber usually follows the steps below. (1) Raw wood pulp fibers are dissolved in N-Methylmorpholine-N-Oxide (NMMO) solvent and are made into cellulose slurry. (2) The spinning solution is discharged through the Filmtruder. (3) After spinning, washing, drying, and other procedures, silk threads are wounded. (4) Finally, the yarn is woven into cloth and then further processed into products for use in clothing, furniture, medical equipment, etc., and sold on the market.

[0014] Due to the rising awareness of environmental protection, the green environment and sustainable development issues have received continuous attention. Traditional Lyocell fiber products still require a large amount of natural raw materials, which are prone to resource consumption. Therefore, the present invention provides a Lyocell fiber with recycled cellulose, which can be mainly derived from second-hand textiles, such as recycled clothes, furniture, or other waste textiles to acquire recycled fiber materials and use the recycled fiber materials to make recycled cellulose slurry to obtain recycled cellulose.

[0015] The Lyocell fiber with recycled cellulose provided by the present invention can use the Lyocell fiber manufacturing process to mix raw wood pulp and recycled cellulose pulp and dissolve them in NMMO solvent to prepare a spinning solution. The filament spinning process is used for spinning. Besides, the used recycled cellulose pulp can be purified and removed from impurities to improve spinning stability.

[0016] The Lyocell fiber with recycled cellulose of the present invention uses 30% to 55% by weight of the recycled cellulose pulp in the spinning solution. Its properties are similar to or better than the silk threads made from raw wood pulp solely. A preferred embodiment of the present invention is 35% to 55% of the recycled cellulose pulp based on the mass of the solution is used in the spinning solution. A more preferred embodiment of the present invention is 43% to 52% of the recycled cellulose pulp based on the mass of the solution is used in the spinning solution. The concentration of the long-chain cellulose molecules in the used spinning solution can be higher so that the viscosity of the spinning solution is increased, and it is able to avoid the breakage of silk threads during the spinning process.

[0017] In summary, the present invention has the following beneficial effects. 1. The Lyocell fiber of the present invention can be applied to the manufacturing process of filament; 2. Compared with Lyocell fibers without recycled cellulose, the Lyocell fiber of the present invention also has hydrophilic, cooling, drape, and antistatic, and biodegradable properties. 3. The Lyocell fiber of the present invention is made from a higher proportion of recycled materials, which can help realize environmental protection goals and sustainable development of low pollution, recyclability, and resource-saving.

[0018] The description above is merely preferred embodiments of the present invention, and it does not limit the scope of patent protection; therefore, modifications of equivalent effects based on the present specification should be deemed to be included in the scope of the present invention.